A spy has his son steal an Admiral's submarine plans.

Evelyn Laye
as Cynthia Eden

Henry Victor
as Lt. Clive Stanton

Hayford Hobbs
as Louis Peel

Norma Whalley
as Mrs. Peel

H. Agar Lyons
as Colonel Dupont

William Freshman
as Wing Eden

Zoe Palmer
as Dora Green

Burton Craig
as Lord Nelson

Robert Cunningham
as Admiral Maybridge